DevTest Unable to create initial pool of database connections

DevTest is unable to create a pool of database connections.The following error is found in the registry.log:ERROR org.apache.tomcat.jdbc.pool.ConnectionPool - Unable to create initial connections of pool.org.h2.jdbc.JdbcSQLException: Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-192]

Cause:

The file used to create the database connection pool is locked.DevTest_Home/prodDb.mv.db